Drone footage captured the full extent of the damage left by a collapsed residential block in the industrial city of Magnitogorsk.
At least nine people were killed in the blast believed to have been caused by a gas leak.
Eight people have been rescued from the rubble, according to Russia's emergencies ministry EMERCOM. Thirty-two people remain missing.
Authorities announced a halt in the search for survivors until the unstable building was secured.
At about 06:00 local time (01:00 GMT) on Monday, an entire section of a 10-storey tower block in Magnitogorsk collapsed, causing dozens to be trapped under debris in freezing conditions.